Designing for iPhone 4's Retina Display (Global Moxie) - 0 views
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App Store Icon 512x512 (scaled down to 175x175 for display in the store)
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Spotlight Search Results and Settings Icon 58x58 (iPhone 4) 50x50 (Spotlight results for iPad) 29x29 (settings for iPad and older iPhones)
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Document Icon This is a new Icon type in iOS 4. It’s used if your app creates a custom document type. The iPad uses the document Icon in two different sizes. 320x320 (iPad) 64x64 (iPad) 44x58 (iPhone 4) 22x29 (older iPhones)
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“Do I really have to make two versions of my images? If I make a single high-resolution set, won’t iOS 4 scale them down on older devices?” Sorry, no, not automatically. While iOS 4 goes seamlessly in the other direction (scaling up low-res images for iPhone 4), it doesn’t work the other way. By default, it scales all images so that one pixel equals one point. That’s a great solution for making sure that old apps work correctly on the new phone, but it doesn’t help you go the other way ‘round.
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at 320 ppi